7
TUNING GUIDE
Semi Automatic Tuning (Transceiver Control Interface Disconnected)
1- Reduce the radio power to 10 watts.
2- Turn off or place the amplifier on STANDBY. If you are operating a mercury amp and the
PTT Disconnect cable is installed, this is not necessary.
3- Make sure that the Bypass Button on the mercuryAT is turned off and press the TUNE
Button for 2 seconds. You will see the Banner read “Tune CALL” on the screen.
4- Press PTT in any continuous carrier mode (CW, RTTY, FM, AM)
5- Do not release the PTT until the tuning has completed. It is very Important not to
release PTT as there may be a secondary tuning sequence if the initial tuning has not
acquired an appropriate tune. One of the following Banners will appear on the screen:
Automatic Full Tuning (Transceiver Control Interface Connected)
1- Turn off or place the amplifier on STANDBY. If you are operating a mercury amp and the
PTT Disconnect cable is installed, this is not necessary.
2- Make sure that the Bypass button in mercuryAT is turned off and press the TUNE
button on mercuryAT; you will see the Banner (Tune CALL) on the screen and the tuning
process will start automatically. Then one of the Banners described above will be
displayed.
Important:If the input power level is too low the tuning will not run or will have an
erroneous result. Never tune with more than 40 watts of input to mercuryAT.
If you transmit a constant carrier with more than 700 watts for more than 5 seconds an
alarm will sound -- if transmission is not halted, severe damaged can occur.
mercuryAT will calculate the loss and indicate if the tuning is appropriate to
handle high power.
